The entomofauna of the Şalaj County in Romania has remained poorly known so far. Concerning Auchenorrhyncha (Hemiptera), only 29 species have been recorded earlier voucher specimens of several of them are deposited in the Hungarian Natural History Museum. Intensive collectings were organized in the area by the Vasile Goldiş University (Arad) and the Hungarian Natural History Museum (Budapest) during 2014–2015. The collecting trips have resulted specimens of 198 species. Together with species reported by an earlier paper but not found during the present study, a checklist of 215 species known from the area is presented. The collected material is diverse, most of the species are widely distributed all over the Palaearctic Region. Oncopsis appendiculata Wagner, 1944 (Cicadellidae) is recorded from Romania for the first time. Scaphoideus titanus Ball, 1932 (Cicadellidae) and Stictocephala bisonia Kopp & Yonke, 1977 (Membracidae) are invasive polyphagous species of high agricultural importance. One specimen of an Anakelisia species different from all previously described species known to us were found, they require further taxonomic study.

Keywords:

Şalaj County, Hemiptera, Auchenorrhyncha, faunistics, checklist, new country record, invasive species